diff --git a/i18n/ja.json b/i18n/ja.json
index e821eee5..55df5923 100644
--- a/i18n/ja.json
+++ b/i18n/ja.json
@@ -2,7 +2,7 @@
     "PrivateBin": "PrivateBin",
     "%s is a minimalist, open source online pastebin where the server has zero knowledge of pasted data. Data is encrypted/decrypted %sin the browser%s using 256 bits AES.": "%s is a minimalist, open source online pastebin where the server has zero knowledge of pasted data. Data is encrypted/decrypted %sin the browser%s using 256 bits AES.",
     "More information on the <a href=\"https://privatebin.info/\">project page</a>.": "More information on the <a href=\"https://privatebin.info/\">project page</a>.",
-    "Because ignorance is bliss": "Because ignorance is bliss",
+    "Because ignorance is bliss": "知らぬが仏",
     "Paste does not exist, has expired or has been deleted.": "Paste does not exist, has expired or has been deleted.",
     "%s requires php %s or above to work. Sorry.": "%s requires php %s or above to work. Sorry.",
     "%s requires configuration section [%s] to be present in configuration file.": "%s requires configuration section [%s] to be present in configuration file.",
@@ -15,24 +15,24 @@
         "Please wait %d seconds between each post. (5th plural)"
     ],
     "Paste is limited to %s of encrypted data.": "Paste is limited to %s of encrypted data.",
-    "Invalid data.": "Invalid data.",
+    "Invalid data.": "無効なデータです。",
     "You are unlucky. Try again.": "You are unlucky. Try again.",
-    "Error saving comment. Sorry.": "Error saving comment. Sorry.",
-    "Error saving paste. Sorry.": "Error saving paste. Sorry.",
+    "Error saving comment. Sorry.": "コメントの保存中にエラーが発生しました。申し訳ありません。",
+    "Error saving paste. Sorry.": "ペーストの保存中にエラーが発生しました。申し訳ありません。",
     "Invalid paste ID.": "Invalid paste ID.",
     "Paste is not of burn-after-reading type.": "Paste is not of burn-after-reading type.",
     "Wrong deletion token. Paste was not deleted.": "Wrong deletion token. Paste was not deleted.",
     "Paste was properly deleted.": "Paste was properly deleted.",
-    "JavaScript is required for %s to work. Sorry for the inconvenience.": "JavaScript is required for %s to work. Sorry for the inconvenience.",
-    "%s requires a modern browser to work.": "%s requires a modern browser to work.",
+    "JavaScript is required for %s to work. Sorry for the inconvenience.": "%s の動作にはJavaScriptが必要です。ご迷惑をおかけして申し訳ありません。",
+    "%s requires a modern browser to work.": "%s の動作には最近のブラウザが必要です。",
     "New": "新しい",
     "Send": "送る",
-    "Clone": "Clone",
-    "Raw text": "Raw text",
+    "Clone": "複製",
+    "Raw text": "未加工テキスト",
     "Expires": "Expires",
     "Burn after reading": "Burn after reading",
     "Open discussion": "Open discussion",
-    "Password (recommended)": "Password (recommended)",
+    "Password (recommended)": "パスワード（推奨）",
     "Discussion": "Discussion",
     "Toggle navigation": "Toggle navigation",
     "%d seconds": [